a gun to school and killed nine people in minnesota. teens died at the school shootinginmichigan. andfive children were gunned down at a amish school in pennsylvania. but here is the most stunning number of them all. there have been 181 major school shootings in the united states since the columbine massacre. 181 shootings where students were either wounded or killed. many of the school shootings involved teenagers. in los angeles last year, a teenager snuck a loaded beretta into class. the gun went off and wounded two other students. but young children are victims too. in houston last year, a 6-year-old took a loaded handgun to school. the gun went off. three kids were wounded. many in this country say enough is enough. i'm joined tonight by congressman keith ellison of minnesota and msnbc political analyst and georgetown university professor michael eric dyson. gentlemen, thank you for your time tonight. i'll have an open question to both of you. professor, we'll go with you first. we talk about change in society. what does it take for us to change what we are seeing unfold be